Research into pig enrichment has identified the specific properties of materials that effectively engage natural exploratory behavior, providing evidence-based guidance for producers seeking to meet legal requirements and improve welfare.
Pig enrichment research has provided clear guidance that is not being applied consistently in commercial production. The legal requirement for enrichment materials in the EU has largely been met through provision of hanging chains and ropes — materials that score poorly on behavioral engagement measures. Pigs engage most strongly with materials they can root, manipulate, and ingest — behaviors suppressed in barren environments that are central to the foraging behavioral system. The scientific case for organic substrate enrichment is unambiguous, but implementation faces practical challenges including increased ammonia production, slurry management complexity, and initial management learning curves. Farms that have adopted effective enrichment programs report concurrent reductions in tail biting and improved welfare indicators alongside the enrichment benefits, supporting the business case for higher-quality provision.